Radio frequency current probe characteristic calibrating method based on electromagnetic compatibility analysis and application
A technology of radio frequency current and current probes, applied in the direction of measuring resistance/reactance/impedance, measuring electrical variables, measuring devices, etc., can solve problems such as changes in transfer impedance, achieve accurate results, simple operation, and accurate testing
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[0029] The circuit principle of the current probe used to measure the electromagnetic interference noise current in the circuit is as follows: image 3 shown. The current probe uses mutual inductance to induce the actual electromagnetic interference noise in the line into the probe and transmit it to the measuring instrument. The equivalent circuit model of current probe testing electromagnetic interference noise is as follows: Figure 4 shown. according to Figure 4 , the transfer impedance Z(ω) is defined as:
[0030] Z ( ω ) = V 2 ( ω ) I 1 ( ω ) - - - ( 1 )
[0031] Due to the mutual inductance o...
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